HP 6624A, 6623A, 6621A manual General Calibration Procedure

Page 91

Table A-1. Calibration Commands

Command	Header	Channel*	Data	Syntax
		Range		(see Figure 5-2)
Calibration Mode	CMODE		0,1 (off,on)	C2
Set High Voltage	VHI	1,2,3,4	-	C3
Set Low Voltage	VLO	1,2,3,4	-	C3
Set High Current	IHI	1,2,3,4	-	C3
Set Low Current	ILO	1,2,3,4	-	C3
Calibrate Overvoltage	OVCAL	1,2,3,4	-	C3
Voltage Data	VDATA	1,2,3,4	see Table A-2	C5
Current Data	IDATA	1,2,3,4	see Table A-2	C5

*Channels 3 and 4 are not used in all models.

Table A-2. Voltage and Current Data Ranges

	Voltage Range in Volts				Current Range in Amps
		Vlo		Vhi	llo			Ihi
Output	Min	Max	Min	Max	Min	Max	Min	Max
40 W Low Voltage	0	0.1	18.5	20.5	0	0.15	4.5	5.3
40 W High Voltage	0.04	0.20	44	48	0	0.1	1.5	2.1
80 W Low Voltage	0	0.1	18.5	20.5	0.05	0.25	9	10.5
80 W High Voltage	0.04	0.20	44	48	0	0.1	3.5	4.2

General Calibration Procedure

This procedure causes the voltage of the specified output to go to full scale value. Take appropriate precautions.

The following general procedure applies to any computer that you are using to control your power supply. This procedure must be repeated for each output on your power supply. The calibration commands shown are the actual string commands that must be sent to the power supply. Because the power supply will attempt to calibrate itself even when incorrect or invalid readings are sent to it, it is recommended that you perform some type of error checking after steps 4, 5, and 8 to ensure that the values sent to the supply are legitimate. Use the ranges in Table A-2 as a guide. If an error is detected while in calibration mode, send CLR or turn the supply off to maintain the previous calibration constants. This will prevent incorrect constants from being stored. See Table 5-8 for a list of errors.

Before you continue with this procedure, disconnect all loads from the supply, strap the supply for local sensing, and connect the voltmeter to the + S and - S terminals as shown in the voltage calibration setup of Figure A-1.

Start with output channel 1 and use the following commands to calibrate your power supply:

Calibration Procedures 91

Image 91

Contents HP Part No Operating ManualCertification Safety Summary Symbol Description Safety SummaryEMC Declaration of ConformityAppendix D--Error Messages Installation ProceduresAppendix A--Calibration Procedure Appendix C--Command SummaryTable Of Contents Local Operation Remote OperationProgramming With The Series 200/300 Computer Command SummaryError Messages CalibrationPage Instrument and Manual Identification Safety ConsiderationsGeneral Information IntroductionDescription AccessoriesOutput Combinations Available Model Output Low Range Values High Range Values Basic OperationHP-IB Board Output Boards Qualifying Conditions SpecificationsDefinitions Output Response Characteristics Source Effect SpecificationsOutputs Low High Voltage Temperature Coefficient Supplemental CharacteristicsCommand Processing Time see Figure Outputs Low High Voltage Programming ResolutionReadback Resolution AC Input Power and CurrentLow Voltage High Voltage 80 W Low Voltage Safety Agency ComplianceDimensions all models Output ImpedanceGeneral Information General Information General Information General Information Initial Inspection InstallationLocation and Cooling Line Fuse Input Power Requirements100/120 2110-0342 220/240 2110-0055 Line FusesLine Voltage Conversion Power CordHP-IB Interface Connector Page Getting Started Front Panel Controls and IndicatorsTurning On Your Supply HP-IB Status Annunciators LCL keySystem Control Keys Power Supply StatusAnnunciators Alphanumeric LCDOutput Control Keys Numeric Entry Keys Line SwitchNormal Self Test Indications Sample Self-Test Failure Display Checking Out Your Supply Using Local ControlOvervoltage Test Voltage TestCurrent Test Enter/Output Statements Introduction To Remote OperationIset Enter OCPAddr Sending a Remote CommandOutput Reading the HP-IB AddressGetting Data From The Supply Often Used CommandsDisp a Disp a Returning the Supply to Local Mode Output Ranges Output Connections and Operating InformationOperating Quadrants Protection FeaturesRange Selection Typical Output Range Characteristics Connecting the Load Page Feet Wire Bundled 10 a 20 aCross Section Meters Area in mm2 Multiple Loads Remote Voltage SensingPositive and Negative Voltages Remote Sense Connections Remote Voltage SensingOpen Sense Leads Output Type FormulaOutput Noise Considerations Programming Response Time with an Output CapacitorExternal Trigger Circuit Overvoltage Trigger ConnectionsEquivalent Internal OV Trigger Circuit Battery Charging Power Supply Protection ConsiderationsParallel Operation CV Operation Maximum Allowable Voltage SettingRemote Sensing CC Operation13. Series Connections with Local Sensing CV Operation Series Operation14. Series Connections with Remote Sensing Specifications for Series OperationPage Page HP-IB Operation Remote OperationInterface Function HP-IB Address Selection Programming Syntax Power-On Service Request PONNumeric Data Sheet 1 of 2. Syntax Forms for Power Supply Commands Sheet 2 of 2. Syntax Forms for Power Supply Commands Ovset Fault ?Vset IsetPage Initial Conditions Power Supply CommandsCurrent Programming Voltage ProgrammingRange Switching Overvoltage OV Protection Output On/OffOVSET? Multiple Output Storage & Recall Overcurrent Protection OCPStatus Reporting Clear CommandASTS? UNR +CCBit Assignment of the Serial Poll Register FAULT?UNMASK? Unmask 2,XXXService Request Generation PON ? SRQ?RQS Bit Reprogramming DelayDisplay On/Off Other Queries Explanation Front PanelResponse Code Code Explanation TEST? ResponsesPage General Local ModeLocal Operation Local Control Of Output FunctionsSetting Current Setting VoltageDisplaying the Contents of the Fault Register Setting Overvoltage ProtectionResetting Overvoltage Protection Resetting Overcurrent ProtectionCondition Setting the Reprogramming DelaySetting the Supplys HP-IB Address Local Control Of System FunctionsRCL Enter Displaying Error MessagesAddr Enter STO EnterPage Test Equipment and Setup Required Calibration ProceduresFigure A-1. Calibration Setup General Calibration Procedure Are not stored. Exercise care when moving the leads Pause Calibration Program10 ! Calibration Example Clear Voltmeter Output BufferDisp END of Calibration Program Input ANY More Outputs to CALIBRATE? Y or N,X$Fnend Page Page Path Names Programming With a Series 200/300 ComputerVoltage and Current Programming Voltage and Current Readback Voltage and Current Programming With VariablesPresent Status Programming Power Supply RegistersPrint OUTPUT1 is in CV Mode END if Service Request and Serial PollPrint Overvoltage on Output #2 Enable IntrOFF Intr Print Overvoltage on Output #1Error Detection Stored Operating States Programming Outputs Connected In ParallelInput Enter Operating VOLTAGE,V1 Input Enter Voltage LIMIT,VInput Enter the Desired Current Limit POINT,I Programming Outputs Connected In SeriesTable C-1. Command Summary Command SummaryCommand Description Table C-l. Command Summary ROM? PON?Previously Test Responses Error Codes and MessagesPower-On Self Test Messages Error Responses Table D-l. Power-On Self Test Error MessageError Code Message Explanation ERR? query ERR key Table D-2. Error ResponsesResponse Code Explanation TEST? query Table D-3. TEST? ResponsesPage Make Changes Manual Backdating6623A Generally Applicable AnnotationsII. CE92 Product Specific Annotations 6621ALatin America Or contactEurope Far East